Rock-drilling machine.



. LANGE.

RocK DRILLING MACHINE. APPLIUATION FILED FEB. 16, 1909.

Patented Nov. 19, 1912.

2 SHEETS-SHEET l.

NvENToR YVITNE SSC-1S P. LANGE.

ROCK DRILLING MACHINE.

lAPPLICATION FILED 1113.16, 1909.

LMAHQO.. Patented Nov. 19, 1912.

2 SHEETS-SHEET 2.

l J7 4f .3.9

Wl-rNssES l N1/E NTOK mm Pau (Lan w:

PAUL LANGE, 0F

y x l lll il;

BRIEG, NEAR BRESLAU, GERMANY.

ROCK-DRILLING MACHINE.

Specification of Letters Patent.

Patented Nov. 19, 1912.

Application filed February 16, 1909. Serial No. 478,196. l

To al?. whom. et may concern:

Be it known that I, PAUL LANGE, of Brieg, near Breslau, Prussia,Germany, a subject of the King of Prussia, and whose postoiice addressis Brieg, near Breslau, Irussia, German Empire, have invented new anduseful Improvements in or Relating to Rock- Drilling Machines, of whichthe following is a specification.

This invention relates to improvements in rock-drilling machines, moreparticularly to one in which -a hammer is caused to strike against adrill or boring chisel.

According to this invention a cam disk rotated by any suitable driving`medium such as an electric motor, compressed air, or other means, .iscaused to engage a. roller mounted on the hammer lso as to impart an upand down motion to the spring-controlled hammerfwhich delivers asuccession ofl blows to a drill or chisel, the holder of which isintermittently rotated by means 'of suitable gearing from the motorspindle.

The invention also comprises a device for prevent-ing the breakage ofany part of the machine should the drill or chisel become jammed, andfurther the construction of the drill-holder head for admitting air orwater under pressure for the purpose of clearing away the chips causedby the operation of the machine.

motor, and the drill holder are arranged t0- gether on one case which iseither held by means of a handle by the workman, or can' be secured inany Well-known manner to a suitable frame. V

In the accompanying drawing :-Figure 1 is a longitudinal section of oneconstruction of the machine with' the motor in elevation; Fig. 2 is across-section on line A-B of Fig. 1; Fig. 3 a detail view of the drivinggear for the intermittent rotary -movement of n the drill-holder; Fig. 4a longitudinal section through the bottom portion of a modiliedconstruction of the machine, and Fig. 5

vshows the cam used in theconstruction illus- `a compresse-d air motor.The spindle 2 drives by means of a toothed wheel mounted on an.intermediate spindle 4, a cam disk 6 provided with internal teeth 5 andcarrying one, two or more cam surfaces 7. The cam -to the hammer Thehammer, -the driving.

disk 6 is mounted at the top and at the bottom in the machine frame 10,by means of ball bearings 8 and 9. In the same machine frame 10 ismounted in a sliding manner the hammer ll provided with a square block 12 and a guide rod 13. The block 12 is guided in sliding guides 14 and isprovided with a roller 18 which is mounted by means of Xed ball bearings15 and ball bearings 16 which are adjustable by means of screws 17. Theroller 18 engages with the cam surfaces 7 lof the cam disk 6 during theArotation of the latter and israised and released by them. A spring 20presses the hammer 11 downward, and a second spring 21 acts as a bufferspring, elastically supporting the hammer by means of av pin 22 and aring 23 secured rod 13. Lubricating cups 24 are provided for lubricatingthe movable parts.

Around the hammer 11 is rotatably mounted a sleeve 25 to which is keyeda toothed rim 26. With the latter engages a single 'tooth pinion 27 onthe intermediate spindle 4. The pinion in question is arranged in suchmanner relatively to the cam disk that, when the hammer 11 is raised bymeans Y of the cam 7 and roller 18, the sleeve 25 vis turned to theextent of onetooth of its toothed rim 26, while during the fall of thehammer it remains standing still. In the sleeve 25 is rotatably mounteda holder 30 for the drill or boring chisel 31. The latter is mounted inthe holder in a longitudinally adjustable manner by means of a squareportion 32. Betweenthe flanges of inserted the sleeve 25 and the holder30 is a disk 33 of suit-able material such as rubber, leather, or thelike, and a spring `34 presses the flanges against the disk in suchmanner that a friction clutch is produced,

`vvwhich prevents any breaking of the gear when the edge of the drill 31gets jammed. -A cap 35 screwed on the sleeve 25, prevents the drill 31from falling out. A ring 37 of an angle-shaped cross-section isrotatably mounted between the bottom flange of the cap 35 anda lock ring36, and packing rings 39 close t-he interior in a tight manner. union40, anda similar hose union 41 is mounted on the langeof the cap 35.Another branch or union 42 is formed on or secured to the drill 3l. Thedrill is provided Witha central perforation 43 extending from the branch42 to its edge, which On the ring 37 is mounted a hose f is not shown. Ahose pipe 45 connects the branches 41 and 42 While to the branch 40 isconnected the supply pipe for the rinsing medium which may be `waterunder pressure or compressed air. Thus the cap 35 is formed into arinsing head with av tight joint. The machine frame 10 carries a holder50, through which can be introduced', a pipe 51 which forms a handleWhen the machine is to be held by the workman during the drilling, orthe machine could be secured by means of the same in well known mannerto a suitable frame or the like.

In the construction shown in Fig. 2, the driving gear is modified insuch manner that the spindle 2 drives by means of bevel Wheels 60, 61, ahorizontal spindle 62 with a vertical cam disk 63. Two ball bearings 64,and a step ball bearing 65, are lused for supporting the spindle 62. Theintermediate spindle f4 is in that case driven by bevel wheels 66, 67.The rinsing head is modified by arranging the lock ring 36 at the bottomof the cap 35.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

In a rock drilling machine the combination of a hammer and means forlifting same, said hammer having a head, a shaft and a square guidingblock interposed between said two latter elements, said block beingsuitably shaped to forma casing, a roller adapted to coperate'with saidlifting means and having one of its bearings slidin l dis Osed in saidCasin an extension bracket integral with said block and adapted to formthe fixed support for the other roller bearing anda screw threaded intosaid block for adjusting the movable bearing disposed in said casing. y

In testimony whereof I-have hereunto set my hand in presence of twosubscribing witnesses.

PAUL LANGE.-

Witnesses: f

ERNST KA'rz, ERNSTA BLEIZOH.

